In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science fair project investigates why the number of visible stars changes from place to place.

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Kids conduct a simple birdseed experiment to figure out what kinds of birds live nearby in this fun science activity.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

Protozoa and ciliate and amoeba, oh my! The objective of this science fair project is for students to use a microscope and identify microscopic life.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.